A math expression is anything where you take one or more numbers and add them, subtract them, multiply, divide, etc etc
For example, 2+3 is a math expression
To make it an algebraic expression, we replace one of the numbers with a variable. Often this is the letter x. So let's say we replace the 2 with x. That would have the expression turn into x+3. What we're saying is "some number plus 3"
Normally 2+3 = 5 which is a true equation. Replace the 2 with x and we have x+3 = 5. So we're saying "some number plus 3 is 5". You can guess and check to find that the "some number" has to be 2
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In summary, the expression example was x+3 and the equation was x+3 = 5
Note: an equation is simply two expressions set equal to each other.
Total money nickles are worth of = $2.5
Let number of nickles coins be 'x'
Let number of dime coins be 'y'
Let number of quarter coins be 'z'
we have,
x + y + z = 100 and x = y +z
on solving the two equations, we get x = 50
1 nickle = 5 cents
50 nickles = 250 cents = $2.5
<u>Answer:
</u>
The value of (f+g) x=
<u>Solution:
</u>
From question given that f(x)=3x-2 --- eqn 1(1)
And 
--- eqn 2
We need to calculate (f+g)x
Since (f+g)x=f(x)+g(x) --- eqn (3)
On substituting the value of f(x) and g(x) in equation (3) using equation (1) and (2),
Rewrite the above term,
On simplifying the above term,
Hence value of (f+g) x=
